Add tests for custom canned_fs_config.

There are no tests to verify the generated action for the canned fs
config entries, so add some.

Also update the prop's docstring to reflect the actual logic.

Bug: 275209284
Fixes: 275280970
Test: soong tests

Change-Id: I37f2a8640bf4c307068a77db7a635c9bbeb9f38f

1 files changed, 42 insertions, 0 deletions

diff --git a/apex/apex_test.go b/apex/apex_test.go
index c9665a4b8..05c888abe 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -10105,3 +10105,45 @@ func TestTrimmedApex(t *testing.T) {
 	android.AssertStringDoesContain(t, "missing lib to trim", libs_to_trim, "libbar")
 	android.AssertStringDoesNotContain(t, "unexpected libs in the libs to trim", libs_to_trim, "libbaz")
 }
+
+func TestCannedFsConfig(t *testing.T) {
+	ctx := testApex(t, `
+		apex {
+			name: "myapex",
+			key: "myapex.key",
+			updatable: false,
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}`)
+	mod := ctx.ModuleForTests("myapex", "android_common_myapex_image")
+	generateFsRule := mod.Rule("generateFsConfig")
+	cmd := generateFsRule.RuleParams.Command
+
+	ensureContains(t, cmd, `( echo '/ 1000 1000 0755'; echo '/apex_manifest.json 1000 1000 0644'; echo '/apex_manifest.pb 1000 1000 0644'; ) >`)
+}
+
+func TestCannedFsConfig_HasCustomConfig(t *testing.T) {
+	ctx := testApex(t, `
+		apex {
+			name: "myapex",
+			key: "myapex.key",
+			canned_fs_config: "my_config",
+			updatable: false,
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}`)
+	mod := ctx.ModuleForTests("myapex", "android_common_myapex_image")
+	generateFsRule := mod.Rule("generateFsConfig")
+	cmd := generateFsRule.RuleParams.Command
+
+	// Ensure that canned_fs_config has "cat my_config" at the end
+	ensureContains(t, cmd, `( echo '/ 1000 1000 0755'; echo '/apex_manifest.json 1000 1000 0644'; echo '/apex_manifest.pb 1000 1000 0644'; cat my_config ) >`)
+}