Add a one.project one pkg test

Author: philderbeast

cabal-testsuite/PackageTests/ReplProjectTarget/cabal.out

@@ -34,3 +34,17 @@ Error: [Cabal-7076]
 There are no packages in 'empty.project'. Please add a package to the project and pick a single [package:][ctype:]component as target for the REPL command.
 # checking repl command with a missing 'missing.project'
 # cabal repl
+# checking repl command with a single package in 'one.project'
+# cabal repl
+Configuration is affected by the following files:
+- one.project
+Resolving dependencies...
+Build profile: -w ghc-<GHCVER> -O1
+In order, the following will be built:
+ - pkg-one-0.1 (interactive) (first run)
+Configuring pkg-one-0.1...
+Preprocessing library for pkg-one-0.1...
+Error: [Cabal-7554]
+can't find source for Foo in ., <ROOT>/cabal.dist/work/./dist/build/<ARCH>/ghc-<GHCVER>/pkg-one-0.1/build/autogen, <ROOT>/cabal.dist/work/./dist/build/<ARCH>/ghc-<GHCVER>/pkg-one-0.1/build/global-autogen
+Error: [Cabal-7125]
+repl failed for pkg-one-0.1-inplace.

cabal-testsuite/PackageTests/ReplProjectTarget/cabal.test.hs

@@ -32,4 +32,9 @@ main = cabalTest . recordMode RecordMarked $ do
   missing <- fails $ cabal' "repl" [ "--project-file=missing.project" ]
   assertOutputContains "The given project file 'missing.project' does not exist." missing
 
+  log "checking repl command with a single package in 'one.project'"
+  one <- fails $ cabal' "repl" [ "--project-file=one.project" ]
+  assertOutputContains "In order, the following will be built" one
+  assertOutputContains "pkg-one-0.1 (interactive) (first run)" one
+
   return ()

cabal-testsuite/PackageTests/ReplProjectTarget/one.project

@@ -0,0 +1 @@
+packages: pkg-one