minor rework of test cases

- we don't need to care about tokens

- we need to care about existing/nonexisting newline at EOL
when there's just a single line in the file

internal/oonirun/v2_test.go

@@ -710,7 +710,7 @@ func Test_readFirstLineFromFile(t *testing.T) {
 		}
 	})
 
-	t.Run("return first line with a file of one line", func(t *testing.T) {
+	t.Run("return first line with a file of one line without EOL", func(t *testing.T) {
 		f, err := os.CreateTemp(t.TempDir(), "auth-")
 		if err != nil {
 			t.Fatal(err)
@@ -730,16 +730,14 @@ func Test_readFirstLineFromFile(t *testing.T) {
 		}
 	})
 
-	t.Run("return first line with a file of >1 line", func(t *testing.T) {
+	t.Run("return first line with a file of one line with EOL", func(t *testing.T) {
 		f, err := os.CreateTemp(t.TempDir(), "auth-")
 		if err != nil {
 			t.Fatal(err)
 		}
 
 		token := "c2VjcmV0" // b64("secret")
-		f.Write([]byte(token))
-		f.Write([]byte("\n"))
-		f.Write([]byte("something\nelse\nand\nsomething\nmore"))
+		f.Write(append([]byte(token), '\n'))
 		defer f.Close()
 		defer os.Remove(f.Name())
 
@@ -752,7 +750,7 @@ func Test_readFirstLineFromFile(t *testing.T) {
 		}
 	})
 
-	t.Run("return only first token if >1 is found", func(t *testing.T) {
+	t.Run("return first line with a file of >1 line", func(t *testing.T) {
 		f, err := os.CreateTemp(t.TempDir(), "auth-")
 		if err != nil {
 			t.Fatal(err)
@@ -761,7 +759,7 @@ func Test_readFirstLineFromFile(t *testing.T) {
 		token := "c2VjcmV0" // b64("secret")
 		f.Write([]byte(token))
 		f.Write([]byte("\n"))
-		f.Write([]byte(" antani\n"))
+		f.Write([]byte("something\nelse\nand\nsomething\nmore"))
 		defer f.Close()
 		defer os.Remove(f.Name())
 
@@ -797,5 +795,4 @@ func Test_readFirstLineFromFile(t *testing.T) {
 			t.Fatal("expected err==nil")
 		}
 	})
-
 }