From 050686d85fbc2046ba6d26a658691d620a5c7c83 Mon Sep 17 00:00:00 2001
From: Chris Smowton <chris@smowton.net>
Date: Mon, 5 Aug 2019 12:04:40 +0100
Subject: [PATCH] Add unit tests for me.zhyd.oauth.utils.StringUtils

These tests were written using Diffblue Cover.
---
 .../me/zhyd/oauth/utils/StringUtilsTest.java  | 93 +++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 src/test/java/me/zhyd/oauth/utils/StringUtilsTest.java

diff --git a/src/test/java/me/zhyd/oauth/utils/StringUtilsTest.java b/src/test/java/me/zhyd/oauth/utils/StringUtilsTest.java
new file mode 100644
index 0000000..3a32b0c
--- /dev/null
+++ b/src/test/java/me/zhyd/oauth/utils/StringUtilsTest.java
@@ -0,0 +1,93 @@
+package me.zhyd.oauth.utils;
+
+import org.junit.Assert;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+public class StringUtilsTest {
+    @Rule public final ExpectedException thrown =
+        ExpectedException.none();
+
+    @Test
+    public void isEmptyNonEmptyInput() {
+        Assert.assertFalse(StringUtils.isEmpty("non-empty string"));
+    }
+
+    @Test
+    public void isEmptyEmptyInput() {
+        Assert.assertTrue(StringUtils.isEmpty(""));
+    }
+
+    @Test
+    public void isEmptyInputNull() {
+        Assert.assertTrue(StringUtils.isEmpty(null));
+    }
+
+    @Test
+    public void isNotEmptyNonEmptyInput() {
+        Assert.assertTrue(StringUtils.isNotEmpty("non-empty string"));
+    }
+
+    @Test
+    public void isNotEmptyEmptyInput() {
+        Assert.assertFalse(StringUtils.isNotEmpty(""));
+    }
+
+    @Test
+    public void isNotEmptyInputNull() {
+        Assert.assertFalse(StringUtils.isNotEmpty(null));
+    }
+
+    @Test
+    public void appendIfNotContainAppendedStringNotPresent() {
+        // (Check the case where appendStr doesn't occur in str)
+        final String str = "Prefix ";
+        final String appendStr = "suffix";
+        final String otherwise = "should be discarded";
+
+        final String result =
+            StringUtils.appendIfNotContain(str, appendStr, otherwise);
+
+        Assert.assertEquals("Prefix suffix", result);
+    }
+
+    @Test
+    public void appendIfNotContainAppendedStringPresent() {
+        // (Check the case where appendStr occurs in str)
+        final String str = "Prefix ";
+        final String appendStr = "Prefix";
+        final String otherwise = "should be appended";
+
+        final String result =
+            StringUtils.appendIfNotContain(str, appendStr, otherwise);
+
+        Assert.assertEquals("Prefix should be appended", result);
+    }
+
+    @Test
+    public void appendIfNotContainEmptyString() {
+        // (Check the special-case for str being empty)
+        final String str = "";
+        final String appendStr = "should not be appended";
+        final String otherwise = "should also not be appended";
+
+        final String result =
+            StringUtils.appendIfNotContain(str, appendStr, otherwise);
+
+        Assert.assertEquals("", result);
+    }
+
+    @Test
+    public void appendIfNotContainAppendingEmptyString() {
+        // (Check the special-case for appendStr being empty)
+        final String str = "should be kept";
+        final String appendStr = "";
+        final String otherwise = "should also not be appended";
+
+        final String result =
+            StringUtils.appendIfNotContain(str, appendStr, otherwise);
+
+        Assert.assertEquals("should be kept", result);
+    }
+}
-- 
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