Tests: Check find_dependency empty extra arguments

Add cases for empty arg 2 and arg 3.

Tests/RunCMake/find_dependency/RunCMakeTest.cmake

@@ -1,5 +1,7 @@
 include(RunCMake)
 
 run_cmake(EXACT-no-version)
+run_cmake(empty-version)
+run_cmake(empty-arg-3)
 run_cmake(invalid-arg-3)
 run_cmake(extra-args)

Tests/RunCMake/find_dependency/empty-arg-3-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/find_dependency/empty-arg-3-stderr.txt

@@ -0,0 +1,5 @@
+CMake Error at .*Modules/CMakeFindDependencyMacro.cmake:[0-9]+ \(message\):
+  Invalid arguments to find_dependency
+Call Stack \(most recent call first\):
+  empty-arg-3.cmake:4 \(find_dependency\)
+  CMakeLists.txt:4 \(include\)

Tests/RunCMake/find_dependency/empty-arg-3.cmake

@@ -0,0 +1,4 @@
+
+include(CMakeFindDependencyMacro)
+
+find_dependency(Pack1 1.2 "")

Tests/RunCMake/find_dependency/empty-version-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/find_dependency/empty-version-stderr.txt

@@ -0,0 +1,5 @@
+CMake Error at .*/Modules/CMakeFindDependencyMacro.cmake:[0-9]+ \(message\):
+  Invalid arguments to find_dependency.  VERSION is empty
+Call Stack \(most recent call first\):
+  empty-version.cmake:4 \(find_dependency\)
+  CMakeLists.txt:4 \(include\)

Tests/RunCMake/find_dependency/empty-version.cmake

@@ -0,0 +1,4 @@
+
+include(CMakeFindDependencyMacro)
+
+find_dependency(Pack1 "")