More startsWith(), endsWith() tests

Author: fluentfuture

mug/src/test/java/com/google/mu/util/SubstringTest.java

@@ -2049,39 +2049,110 @@ public void skipFromEnd_toString() {
   }
 
   @Test
-  public void matchStartsWith_emptyMatch() {
+  public void matchStartsWith_empty() {
     Substring.Match match = Substring.first("").in("abc").get();
     assertThat(match.startsWith("")).isTrue();
     assertThat(match.startsWith("a")).isFalse();
   }
 
   @Test
-  public void matchStartsWith_nonEmptyMatch() {
+  public void matchStartsWith_singleChars() {
+    Substring.Match match = Substring.first("c").in("abcd").get();
+    assertThat(match.startsWith("")).isTrue();
+    assertThat(match.startsWith("c")).isTrue();
+    assertThat(match.startsWith("bc")).isFalse();
+    assertThat(match.startsWith("cd")).isFalse();
+    assertThat(match.startsWith("d")).isFalse();
+  }
+
+  @Test
+  public void matchStartsWith_twoChars() {
     Substring.Match match = Substring.first("bc").in("abcd").get();
     assertThat(match.startsWith("")).isTrue();
     assertThat(match.startsWith("b")).isTrue();
     assertThat(match.startsWith("bc")).isTrue();
     assertThat(match.startsWith("bcd")).isFalse();
     assertThat(match.startsWith("c")).isFalse();
+  }
+
+  @Test
+  public void matchStartsWith_threeChars() {
+    Substring.Match match = Substring.first("bcd").in("abcde").get();
+    assertThat(match.startsWith("")).isTrue();
+    assertThat(match.startsWith("b")).isTrue();
+    assertThat(match.startsWith("bc")).isTrue();
+    assertThat(match.startsWith("bcd")).isTrue();
+    assertThat(match.startsWith("bcde")).isFalse();
+    assertThat(match.startsWith("c")).isFalse();
+    assertThat(match.startsWith("d")).isFalse();
+    assertThat(match.startsWith("e")).isFalse();
+  }
+
+  @Test
+  public void matchStartsWith_withSkip() {
+    Substring.Match match = Substring.first("bc").in("abcd").get();
     assertThat(match.skip(1, 0).startsWith("c")).isTrue();
   }
 
   @Test
-  public void matchEndsWith_emptyMatch() {
+  public void matchStartsWith_withLimit() {
+    Substring.Match match = Substring.first("bc").in("abcd").get();
+    assertThat(match.limit(1).startsWith("b")).isTrue();
+    assertThat(match.limit(1).startsWith("bc")).isFalse();
+  }
+
+  @Test
+  public void matchEndsWith_empty() {
     Substring.Match match = Substring.first("").in("abc").get();
     assertThat(match.endsWith("")).isTrue();
     assertThat(match.endsWith("c")).isFalse();
   }
 
   @Test
-  public void matchEndsWith_nonEmptyMatch() {
+  public void matchEndsWith_singleChars() {
+    Substring.Match match = Substring.first("b").in("abcd").get();
+    assertThat(match.endsWith("")).isTrue();
+    assertThat(match.endsWith("b")).isTrue();
+    assertThat(match.endsWith("bc")).isFalse();
+    assertThat(match.endsWith("ab")).isFalse();
+    assertThat(match.endsWith("d")).isFalse();
+  }
+
+  @Test
+  public void matchEndsWith_twoChars() {
     Substring.Match match = Substring.first("bc").in("abcd").get();
     assertThat(match.endsWith("")).isTrue();
     assertThat(match.endsWith("c")).isTrue();
     assertThat(match.endsWith("bc")).isTrue();
     assertThat(match.endsWith("bcd")).isFalse();
     assertThat(match.endsWith("d")).isFalse();
+  }
+
+  @Test
+  public void matchEndsWith_threeChars() {
+    Substring.Match match = Substring.first("bcd").in("abcde").get();
+    assertThat(match.endsWith("")).isTrue();
+    assertThat(match.endsWith("cd")).isTrue();
+    assertThat(match.endsWith("bcd")).isTrue();
+    assertThat(match.endsWith("abcd")).isFalse();
+    assertThat(match.endsWith("de")).isFalse();
+  }
+
+  @Test
+  public void matchEndsWith_withLimit() {
+    Substring.Match match = Substring.first("bc").in("abcd").get();
     assertThat(match.limit(1).endsWith("b")).isTrue();
+    assertThat(match.limit(1).endsWith("")).isTrue();
+    assertThat(match.limit(1).endsWith("bc")).isFalse();
+  }
+
+  @Test
+  public void matchEndsWith_withSkip() {
+    Substring.Match match = Substring.first("bcd").in("abcde").get();
+    assertThat(match.skip(1, 1).endsWith("")).isTrue();
+    assertThat(match.skip(1, 1).endsWith("c")).isTrue();
+    assertThat(match.skip(1, 1).endsWith("cd")).isFalse();
+    assertThat(match.skip(1, 1).endsWith("bc")).isFalse();
   }
 
   @Test public void or_toString() {