msi: Add some tests for MsiGetTargetPathW.

dlls/msi/tests/package.c

@@ -843,7 +843,10 @@ static void test_doaction( void )
 
 static void test_gettargetpath_bad(void)
 {
+    static const WCHAR boo[] = {'b','o','o',0};
+    static const WCHAR empty[] = {0};
     char buffer[0x80];
+    WCHAR bufferW[0x80];
     MSIHANDLE hpkg;
     DWORD sz;
     UINT r;
@@ -869,6 +872,32 @@ static void test_gettargetpath_bad(void)
     r = MsiGetTargetPath( hpkg, "boo", buffer, NULL );
     ok( r == ERROR_DIRECTORY, "wrong return val\n");
 
+    sz = 0;
+    r = MsiGetTargetPath( hpkg, "", buffer, &sz );
+    ok( r == ERROR_DIRECTORY, "wrong return val\n");
+
+    r = MsiGetTargetPathW( 0, NULL, NULL, NULL );
+    ok( r == ERROR_INVALID_PARAMETER, "wrong return val\n");
+
+    r = MsiGetTargetPathW( 0, NULL, NULL, &sz );
+    ok( r == ERROR_INVALID_PARAMETER, "wrong return val\n");
+
+    r = MsiGetTargetPathW( 0, boo, NULL, NULL );
+    ok( r == ERROR_INVALID_HANDLE, "wrong return val\n");
+
+    r = MsiGetTargetPathW( 0, boo, NULL, NULL );
+    ok( r == ERROR_INVALID_HANDLE, "wrong return val\n");
+
+    r = MsiGetTargetPathW( hpkg, boo, NULL, NULL );
+    ok( r == ERROR_DIRECTORY, "wrong return val\n");
+
+    r = MsiGetTargetPathW( hpkg, boo, bufferW, NULL );
+    ok( r == ERROR_DIRECTORY, "wrong return val\n");
+
+    sz = 0;
+    r = MsiGetTargetPathW( hpkg, empty, bufferW, &sz );
+    ok( r == ERROR_DIRECTORY, "wrong return val\n");
+
     MsiCloseHandle( hpkg );
     DeleteFile(msifile);
 }