add String#starts_with?:

bakkdoor · Dec 6, 2012 · 27ce7ef · 27ce7ef
1 parent bec9b93
commit 27ce7ef
Show file tree

Hide file tree

Showing 2 changed files with 14 additions and 0 deletions.
diff --git a/lib/string.fy b/lib/string.fy
@@ -281,4 +281,8 @@ class String {
     { return false } if: blank?
     lowercase == self
   }
+
+  def starts_with?: string {
+    from: 0 to: (string size - 1) == string
+  }
 }
diff --git a/tests/string.fy b/tests/string.fy
@@ -264,4 +264,14 @@ FancySpec describe: String with: {
     "A" lowercase? is: false
     "abc" lowercase? is: true
   }
+
+  it: "returns true if its begins with another string" with: 'starts_with?: when: {
+    "" starts_with?: "" . is: true
+    "foo" starts_with?: "f" . is: true
+    "foo" starts_with?: "fo" . is: true
+    "foo" starts_with?: "foo" . is: true
+    "foo" starts_with?: "fooo" . is: false
+    "foo" starts_with?: "oo" . is: false
+    "foo" starts_with?: "" . is: false
+  }
 }