Test our executability checker

m/pagermode-viewing_test.go

@@ -0,0 +1,32 @@
+package m
+
+import (
+	"os"
+	"testing"
+)
+
+func TestErrUnlessExecutable_yes(t *testing.T) {
+	// Find our own executable
+	executable, err := os.Executable()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Check that it's executable
+	err = errUnlessExecutable(executable)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestErrUnlessExecutable_no(t *testing.T) {
+	textFile := "pagermode-viewing_test.go"
+	if _, err := os.Stat(textFile); os.IsNotExist(err) {
+		t.Fatal("Test setup failed, text file not found: " + textFile)
+	}
+
+	err := errUnlessExecutable(textFile)
+	if err == nil {
+		t.Fatal("Expected error, got nil")
+	}
+}