Increase test coverage of fpm manifest

- should yield complete coverage for all reachable lines in manifest
- adds description, keywords and categories to allowed keys in root
- fixes revision -> rev in dependency table
- fixes path not excluding tag, rev and branch entry
- fixes grammar of error messages
- bump commit to latest toml-f version

9 files changed, 520 insertions, 53 deletions

diff --git a/fpm/fpm.toml b/fpm/fpm.toml
index b39d881..5e0c884 100644
--- a/fpm/fpm.toml
+++ b/fpm/fpm.toml
@@ -8,7 +8,7 @@ copyright = "2020 fpm contributors"
 [dependencies]
 [dependencies.toml-f]
 git = "https://github.com/toml-f/toml-f"
-rev = "290ba87671ab593e7bd51599e1d80ea736b3cd36"
+rev = "d7371fc8de004e34ac1d461a0d590f6015545168"
 
 [[test]]
 name = "fpm-test"
diff --git a/fpm/src/fpm/manifest/dependency.f90 b/fpm/src/fpm/manifest/dependency.f90
index 8a3d879..599d43a 100644
--- a/fpm/src/fpm/manifest/dependency.f90
+++ b/fpm/src/fpm/manifest/dependency.f90
@@ -94,7 +94,7 @@ contains
             end if
 
             if (.not.allocated(self%git)) then
-                call get_value(table, "revision", obj)
+                call get_value(table, "rev", obj)
                 if (allocated(obj)) then
                     self%git = git_target_revision(url, obj)
                 end if
@@ -120,9 +120,10 @@ contains
 
         character(len=:), allocatable :: name
         type(toml_key), allocatable :: list(:)
-        logical :: url_present, git_target_present
+        logical :: url_present, git_target_present, has_path
         integer :: ikey
 
+        has_path = .false.
         url_present = .false.
         git_target_present = .false.
 
@@ -146,6 +147,7 @@ contains
                     exit
                 end if
                 url_present = .true.
+                has_path = list(ikey)%key == 'path'
 
             case("branch", "rev", "tag")
                 if (git_target_present) then
@@ -163,7 +165,7 @@ contains
             return
         end if
 
-        if (.not.url_present .and. git_target_present) then
+        if (has_path .and. git_target_present) then
             call syntax_error(error, "Dependency "//name//" uses a local path, therefore no git identifiers are allowed")
         end if
 
@@ -182,7 +184,7 @@ contains
         !> Error handling
         type(error_t), allocatable, intent(out) :: error
 
-        class(toml_table), pointer :: node
+        type(toml_table), pointer :: node
         type(toml_key), allocatable :: list(:)
         integer :: idep, stat
 
diff --git a/fpm/src/fpm/manifest/executable.f90 b/fpm/src/fpm/manifest/executable.f90
index f706001..6675519 100644
--- a/fpm/src/fpm/manifest/executable.f90
+++ b/fpm/src/fpm/manifest/executable.f90
@@ -57,7 +57,7 @@ contains
         !> Error handling
         type(error_t), allocatable, intent(out) :: error
 
-        class(toml_table), pointer :: child
+        type(toml_table), pointer :: child
 
         call check(table, error)
         if (allocated(error)) return
@@ -104,7 +104,7 @@ contains
         do ikey = 1, size(list)
             select case(list(ikey)%key)
             case default
-                call syntax_error(error, "Key "//list(ikey)%key//" is not allowed executable entry")
+                call syntax_error(error, "Key "//list(ikey)%key//" is not allowed as executable entry")
                 exit
 
             case("name")
@@ -115,6 +115,7 @@ contains
 
             end select
         end do
+        if (allocated(error)) return
 
         if (.not.name_present) then
             call syntax_error(error, "Executable name is not provided, please add a name entry")
diff --git a/fpm/src/fpm/manifest/library.f90 b/fpm/src/fpm/manifest/library.f90
index 40e5e92..7a79a2a 100644
--- a/fpm/src/fpm/manifest/library.f90
+++ b/fpm/src/fpm/manifest/library.f90
@@ -77,7 +77,7 @@ contains
         do ikey = 1, size(list)
             select case(list(ikey)%key)
             case default
-                call syntax_error(error, "Key "//list(ikey)%key//" is not allowed in package file")
+                call syntax_error(error, "Key "//list(ikey)%key//" is not allowed in library")
                 exit
 
             case("source-dir", "build-script")
diff --git a/fpm/src/fpm/manifest/package.f90 b/fpm/src/fpm/manifest/package.f90
index 4c2c14a..349a9a8 100644
--- a/fpm/src/fpm/manifest/package.f90
+++ b/fpm/src/fpm/manifest/package.f90
@@ -85,8 +85,8 @@ contains
         !> Error handling
         type(error_t), allocatable, intent(out) :: error
 
-        class(toml_table), pointer :: child, node
-        class(toml_array), pointer :: children
+        type(toml_table), pointer :: child, node
+        type(toml_array), pointer :: children
         integer :: ii, nn, stat
 
         call check(table, error)
@@ -185,7 +185,7 @@ contains
 
             case("version", "license", "author", "maintainer", "copyright", &
                     & "dependencies", "dev-dependencies", "test", "executable", &
-                    & "library")
+                    & "description", "keywords", "categories", "library")
                 continue
 
             end select
diff --git a/fpm/src/fpm/manifest/test.f90 b/fpm/src/fpm/manifest/test.f90
index a6c6f64..de4c847 100644
--- a/fpm/src/fpm/manifest/test.f90
+++ b/fpm/src/fpm/manifest/test.f90
@@ -50,7 +50,7 @@ contains
         !> Error handling
         type(error_t), allocatable, intent(out) :: error
 
-        class(toml_table), pointer :: child
+        type(toml_table), pointer :: child
 
         call check(table, error)
         if (allocated(error)) return
@@ -108,6 +108,7 @@ contains
 
             end select
         end do
+        if (allocated(error)) return
 
         if (.not.name_present) then
             call syntax_error(error, "Test name is not provided, please add a name entry")
diff --git a/fpm/src/fpm/toml.f90 b/fpm/src/fpm/toml.f90
index 183278d..ca14a3c 100644
--- a/fpm/src/fpm/toml.f90
+++ b/fpm/src/fpm/toml.f90
@@ -14,14 +14,14 @@
 module fpm_toml
     use fpm_error, only : error_t, fatal_error, file_not_found_error
     use tomlf, only : toml_table, toml_array, toml_key, toml_stat, get_value, &
-        & toml_parse, toml_error
-    use tomlf_type, only : new_table, len
+        & set_value, toml_parse, toml_error
+    use tomlf_type, only : new_table, add_table, add_array, len
     implicit none
     private
 
     public :: read_package_file
-    public :: toml_table, toml_array, toml_key, toml_stat, get_value
-    public :: new_table, len
+    public :: toml_table, toml_array, toml_key, toml_stat, get_value, set_value
+    public :: new_table, add_table, add_array, len
 
 
 contains
diff --git a/fpm/test/test_manifest.f90 b/fpm/test/test_manifest.f90
index 223b346..c47ecba 100644
--- a/fpm/test/test_manifest.f90
+++ b/fpm/test/test_manifest.f90
@@ -1,6 +1,7 @@
 !> Define tests for the `fpm_manifest` modules
 module test_manifest
-    use testsuite, only : new_unittest, unittest_t, error_t, test_failed
+    use testsuite, only : new_unittest, unittest_t, error_t, test_failed, &
+        & check_string
     use fpm_manifest
     implicit none
     private
@@ -23,11 +24,30 @@ contains
             & new_unittest("default-library", test_default_library), &
             & new_unittest("default-executable", test_default_executable), &
             & new_unittest("dependency-empty", test_dependency_empty, should_fail=.true.), &
+            & new_unittest("dependency-pathtag", test_dependency_pathtag, should_fail=.true.), &
+            & new_unittest("dependency-gitpath", test_dependency_gitpath, should_fail=.true.), &
+            & new_unittest("dependency-nourl", test_dependency_nourl, should_fail=.true.), &
+            & new_unittest("dependency-gitconflict", test_dependency_gitconflict, should_fail=.true.), &
+            & new_unittest("dependency-wrongkey", test_dependency_wrongkey, should_fail=.true.), &
             & new_unittest("dependencies-empty", test_dependencies_empty), &
+            & new_unittest("dependencies-typeerror", test_dependencies_typeerror, should_fail=.true.), &
             & new_unittest("executable-empty", test_executable_empty, should_fail=.true.), &
+            & new_unittest("executable-typeerror", test_executable_typeerror, should_fail=.true.), &
+            & new_unittest("executable-noname", test_executable_noname, should_fail=.true.), &
+            & new_unittest("executable-wrongkey", test_executable_wrongkey, should_fail=.true.), &
             & new_unittest("library-empty", test_library_empty), &
+            & new_unittest("library-wrongkey", test_library_wrongkey, should_fail=.true.), &
+            & new_unittest("package-simple", test_package_simple), &
             & new_unittest("package-empty", test_package_empty, should_fail=.true.), &
-            & new_unittest("test-empty", test_test_empty, should_fail=.true.)]
+            & new_unittest("package-typeerror", test_package_typeerror, should_fail=.true.), &
+            & new_unittest("package-noname", test_package_noname, should_fail=.true.), &
+            & new_unittest("package-wrongexe", test_package_wrongexe, should_fail=.true.), &
+            & new_unittest("package-wrongtest", test_package_wrongtest, should_fail=.true.), &
+            & new_unittest("test-simple", test_test_simple), &
+            & new_unittest("test-empty", test_test_empty, should_fail=.true.), &
+            & new_unittest("test-typeerror", test_test_typeerror, should_fail=.true.), &
+            & new_unittest("test-noname", test_test_noname, should_fail=.true.), &
+            & new_unittest("test-wrongkey", test_test_wrongkey, should_fail=.true.)]
 
     end subroutine collect_manifest
 
@@ -143,16 +163,9 @@ contains
         allocate(package%library)
         call default_library(package%library)
 
-        if (.not.allocated(package%library%source_dir)) then
-            call test_failed(error, "Default library source-dir is not set")
-            return
-        end if
-
-        if (package%library%source_dir /= "src") then
-            call test_failed(error, "Default library source-dir is "// &
-                & package%library%source_dir//" but should be src")
-            return
-        end if
+        call check_string(error, package%library%source_dir, "src", &
+            & "Default library source-dir")
+        if (allocated(error)) return
 
     end subroutine test_default_library
 
@@ -169,22 +182,13 @@ contains
         allocate(package%executable(1))
         call default_executable(package%executable(1), name)
 
-        if (.not.allocated(package%executable(1)%source_dir)) then
-            call test_failed(error, "Default executable source-dir is not set")
-            return
-        end if
-
-        if (package%executable(1)%source_dir /= "app") then
-            call test_failed(error, "Default executable source-dir is "// &
-                & package%executable(1)%source_dir//" but should be app")
-            return
-        end if
+        call check_string(error, package%executable(1)%source_dir, "app", &
+            & "Default executable source-dir")
+        if (allocated(error)) return
 
-        if (package%executable(1)%name /= name) then
-            call test_failed(error, "Default executable name is "// &
-                & package%executable(1)%name//" but should be "//name)
-            return
-        end if
+        call check_string(error, package%executable(1)%name, name, &
+            & "Default executable name")
+        if (allocated(error)) return
 
     end subroutine test_default_executable
 
@@ -208,6 +212,115 @@ contains
     end subroutine test_dependency_empty
 
 
+    !> Try to create a dependency with conflicting entries
+    subroutine test_dependency_pathtag(error)
+        use fpm_manifest_dependency
+        use fpm_toml, only : new_table, toml_table, set_value
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        integer :: stat
+        type(dependency_t) :: dependency
+
+        call new_table(table)
+        table%key = 'example'
+        call set_value(table, 'path', '"package"', stat)
+        call set_value(table, 'tag', '"v20.1"', stat)
+
+        call new_dependency(dependency, table, error)
+
+    end subroutine test_dependency_pathtag
+
+
+    !> Try to create a dependency with conflicting entries
+    subroutine test_dependency_nourl(error)
+        use fpm_manifest_dependency
+        use fpm_toml, only : new_table, toml_table, set_value
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        integer :: stat
+        type(dependency_t) :: dependency
+
+        call new_table(table)
+        table%key = 'example'
+        call set_value(table, 'tag', '"v20.1"', stat)
+
+        call new_dependency(dependency, table, error)
+
+    end subroutine test_dependency_nourl
+
+
+    !> Try to create a dependency with conflicting entries
+    subroutine test_dependency_gitpath(error)
+        use fpm_manifest_dependency
+        use fpm_toml, only : new_table, toml_table, set_value
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        integer :: stat
+        type(dependency_t) :: dependency
+
+        call new_table(table)
+        table%key = 'example'
+        call set_value(table, 'path', '"package"', stat)
+        call set_value(table, 'git', '"https://gitea.com/fortran-lang/pack"', stat)
+
+        call new_dependency(dependency, table, error)
+
+    end subroutine test_dependency_gitpath
+
+
+    !> Try to create a dependency with conflicting entries
+    subroutine test_dependency_gitconflict(error)
+        use fpm_manifest_dependency
+        use fpm_toml, only : new_table, toml_table, set_value
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        integer :: stat
+        type(dependency_t) :: dependency
+
+        call new_table(table)
+        table%key = 'example'
+        call set_value(table, 'git', '"https://gitea.com/fortran-lang/pack"', stat)
+        call set_value(table, 'branch', '"latest"', stat)
+        call set_value(table, 'tag', '"v20.1"', stat)
+
+        call new_dependency(dependency, table, error)
+
+    end subroutine test_dependency_gitconflict
+
+
+    !> Try to create a dependency with conflicting entries
+    subroutine test_dependency_wrongkey(error)
+        use fpm_manifest_dependency
+        use fpm_toml, only : new_table, toml_table, set_value
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        integer :: stat
+        type(dependency_t) :: dependency
+
+        call new_table(table)
+        table%key = 'example'
+        call set_value(table, 'not-available', '"anywhere"', stat)
+
+        call new_dependency(dependency, table, error)
+
+    end subroutine test_dependency_wrongkey
+
+
     !> Dependency tables can be empty
     subroutine test_dependencies_empty(error)
         use fpm_manifest_dependency
@@ -231,6 +344,27 @@ contains
     end subroutine test_dependencies_empty
 
 
+    !> Add a dependency as an array, which is not supported
+    subroutine test_dependencies_typeerror(error)
+        use fpm_manifest_dependency
+        use fpm_toml, only : new_table, add_array, toml_table, toml_array
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_array), pointer :: children
+        integer :: stat
+        type(dependency_t), allocatable :: dependencies(:)
+
+        call new_table(table)
+        call add_array(table, 'dep1', children, stat)
+
+        call new_dependencies(dependencies, table, error)
+
+    end subroutine test_dependencies_typeerror
+
+
     !> Executables cannot be created from empty tables
     subroutine test_executable_empty(error)
         use fpm_manifest_executable
@@ -249,6 +383,69 @@ contains
     end subroutine test_executable_empty
 
 
+    !> Pass a wrong TOML type to the name field of the executable
+    subroutine test_executable_typeerror(error)
+        use fpm_manifest_executable
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(executable_t) :: executable
+
+        call new_table(table)
+        call add_table(table, 'name', child, stat)
+
+        call new_executable(executable, table, error)
+
+    end subroutine test_executable_typeerror
+
+
+    !> Pass a TOML table with insufficient entries to the executable constructor
+    subroutine test_executable_noname(error)
+        use fpm_manifest_executable
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(executable_t) :: executable
+
+        call new_table(table)
+        call add_table(table, 'dependencies', child, stat)
+
+        call new_executable(executable, table, error)
+
+    end subroutine test_executable_noname
+
+
+    !> Pass a TOML table with not allowed keys
+    subroutine test_executable_wrongkey(error)
+        use fpm_manifest_executable
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(executable_t) :: executable
+
+        call new_table(table)
+        call add_table(table, 'wrong-field', child, stat)
+
+        call new_executable(executable, table, error)
+
+    end subroutine test_executable_wrongkey
+
+
     !> Libraries can be created from empty tables
     subroutine test_library_empty(error)
         use fpm_manifest_library
@@ -265,20 +462,73 @@ contains
         call new_library(library, table, error)
         if (allocated(error)) return
 
-        if (.not.allocated(library%source_dir)) then
-            call test_failed(error, "Default library source-dir is not set")
-            return
-        end if
-
-        if (library%source_dir /= "src") then
-            call test_failed(error, "Default library source-dir is "// &
-                & library%source_dir//" but should be src")
-            return
-        end if
+        call check_string(error, library%source_dir, "src", &
+            & "Default library source-dir")
+        if (allocated(error)) return
 
     end subroutine test_library_empty
 
 
+    !> Pass a TOML table with not allowed keys
+    subroutine test_library_wrongkey(error)
+        use fpm_manifest_library
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(library_t) :: library
+
+        call new_table(table)
+        call add_table(table, 'not-allowed', child, stat)
+
+        call new_library(library, table, error)
+
+    end subroutine test_library_wrongkey
+
+
+    !> Packages cannot be created from empty tables
+    subroutine test_package_simple(error)
+        use fpm_manifest_package
+        use fpm_toml, only : new_table, add_table, add_array, set_value, &
+            & toml_table, toml_array
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child, child2
+        type(toml_array), pointer :: children
+        integer :: stat
+        type(package_t) :: package
+
+        call new_table(table)
+        call set_value(table, 'name', '"example"', stat)
+        call set_value(table, 'license', '"MIT"', stat)
+        call add_table(table, 'dev-dependencies', child, stat)
+        call add_table(child, 'pkg1', child2, stat)
+        call set_value(child2, 'git', '"https://github.com/fortran-lang/pkg1"', stat)
+        call add_table(child, 'pkg2', child2)
+        call set_value(child2, 'git', '"https://gitlab.com/fortran-lang/pkg2"', stat)
+        call set_value(child2, 'branch', '"devel"', stat)
+        call add_table(child, 'pkg3', child2)
+        call set_value(child2, 'git', '"https://bitbucket.org/fortran-lang/pkg3"', stat)
+        call set_value(child2, 'rev', '"9fceb02d0ae598e95dc970b74767f19372d61af8"', stat)
+        call add_table(child, 'pkg4', child2)
+        call set_value(child2, 'git', '"https://gitea.com/fortran-lang/pkg4"', stat)
+        call set_value(child2, 'tag', '"v1.8.5-rc3"', stat)
+        call add_array(table, 'test', children, stat)
+        call add_table(children, child, stat)
+        call set_value(child, 'name', '"tester"', stat)
+
+        call new_package(package, table, error)
+
+    end subroutine test_package_simple
+
+
     !> Packages cannot be created from empty tables
     subroutine test_package_empty(error)
         use fpm_manifest_package
@@ -297,6 +547,127 @@ contains
     end subroutine test_package_empty
 
 
+    !> Create an array in the package name, which should cause an error
+    subroutine test_package_typeerror(error)
+        use fpm_manifest_package
+        use fpm_toml, only : new_table, add_array, toml_table, toml_array
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_array), pointer :: child
+        integer :: stat
+        type(package_t) :: package
+
+        call new_table(table)
+        call add_array(table, "name", child, stat)
+
+        call new_package(package, table, error)
+
+    end subroutine test_package_typeerror
+
+
+    !> Try to create a new package without a name field
+    subroutine test_package_noname(error)
+        use fpm_manifest_package
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(package_t) :: package
+
+        call new_table(table)
+        call add_table(table, "library", child, stat)
+        call add_table(table, "dev-dependencies", child, stat)
+        call add_table(table, "dependencies", child, stat)
+
+        call new_package(package, table, error)
+
+    end subroutine test_package_noname
+
+
+    !> Try to read executables from a mixed type array
+    subroutine test_package_wrongexe(error)
+        use fpm_manifest_package
+        use fpm_toml, only : new_table, set_value, add_array, toml_table, toml_array
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        type(toml_array), pointer :: children, children2
+        integer :: stat
+        type(package_t) :: package
+
+        call new_table(table)
+        call set_value(table, 'name', '"example"', stat)
+        call add_array(table, 'executable', children, stat)
+        call add_array(children, children2, stat)
+
+        call new_package(package, table, error)
+
+    end subroutine test_package_wrongexe
+
+
+    !> Try to read tests from a mixed type array
+    subroutine test_package_wrongtest(error)
+        use fpm_manifest_package
+        use fpm_toml, only : new_table, set_value, add_array, toml_table, toml_array
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        type(toml_array), pointer :: children, children2
+        integer :: stat
+        type(package_t) :: package
+
+        call new_table(table)
+        call set_value(table, 'name', '"example"', stat)
+        call add_array(table, 'test', children, stat)
+        call add_array(children, children2, stat)
+
+        call new_package(package, table, error)
+
+    end subroutine test_package_wrongtest
+
+
+    !> Tests cannot be created from empty tables
+    subroutine test_test_simple(error)
+        use fpm_manifest_test
+        use fpm_toml, only : new_table, set_value, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        character(len=:), allocatable :: name
+        integer :: stat
+        type(test_t) :: test
+
+        call new_table(table)
+        call set_value(table, 'name', '"example"', stat)
+        call set_value(table, 'source-dir', '"tests"', stat)
+        call set_value(table, 'main', '"tester.f90"', stat)
+        call add_table(table, 'dependencies', child, stat)
+
+        call new_test(test, table, error)
+        if (allocated(error)) return
+
+        call check_string(error, test%main, "tester.f90", "Test main")
+        if (allocated(error)) return
+
+    end subroutine test_test_simple
+
+
     !> Tests cannot be created from empty tables
     subroutine test_test_empty(error)
         use fpm_manifest_test
@@ -315,4 +686,67 @@ contains
     end subroutine test_test_empty
 
 
+    !> Pass a wrong TOML type to the name field of the test
+    subroutine test_test_typeerror(error)
+        use fpm_manifest_test
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(test_t) :: test
+
+        call new_table(table)
+        call add_table(table, 'name', child, stat)
+
+        call new_test(test, table, error)
+
+    end subroutine test_test_typeerror
+
+
+    !> Pass a TOML table with insufficient entries to the test constructor
+    subroutine test_test_noname(error)
+        use fpm_manifest_test
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(test_t) :: test
+
+        call new_table(table)
+        call add_table(table, 'dependencies', child, stat)
+
+        call new_test(test, table, error)
+
+    end subroutine test_test_noname
+
+
+    !> Pass a TOML table with not allowed keys
+    subroutine test_test_wrongkey(error)
+        use fpm_manifest_test
+        use fpm_toml, only : new_table, add_table, toml_table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_table) :: table
+        type(toml_table), pointer :: child
+        integer :: stat
+        type(test_t) :: test
+
+        call new_table(table)
+        call add_table(table, 'not-supported', child, stat)
+
+        call new_test(test, table, error)
+
+    end subroutine test_test_wrongkey
+
+
 end module test_manifest
diff --git a/fpm/test/testsuite.f90 b/fpm/test/testsuite.f90
index bd0d415..411fa24 100644
--- a/fpm/test/testsuite.f90
+++ b/fpm/test/testsuite.f90
@@ -5,6 +5,7 @@ module testsuite
     private
 
     public :: run_testsuite, new_unittest, test_failed
+    public :: check_string
     public :: unittest_t, error_t
 
 
@@ -119,4 +120,32 @@ contains
     end function new_unittest
 
 
+    !> Check a deferred length character variable against a reference value
+    subroutine check_string(error, actual, expected, name)
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        !> Actual string value
+        character(len=:), allocatable, intent(in) :: actual
+
+        !> Expected string value
+        character(len=*), intent(in) :: expected
+
+        !> Name of the string to check
+        character(len=*), intent(in) :: name
+
+        if (.not.allocated(actual)) then
+            call test_failed(error, name//" is not set correctly")
+            return
+        end if
+
+        if (actual /= expected) then
+            call test_failed(error, name//" is "//actual// &
+                & " but should be "//expected)
+        end if
+
+    end subroutine check_string
+
+
 end module testsuite