feat: add new pipe - 'RightPadPipe'

a8m · Jan 30, 2017 · ef66e52 · ef66e52
1 parent 0719400
commit ef66e52
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Showing 3 changed files with 95 additions and 14 deletions.
diff --git a/src/string/index.ts b/src/string/index.ts
@@ -8,6 +8,7 @@ import {LeftTrimPipe} from './ltrim.pipe';
 import {MatchPipe} from './match.pipe';
 import {PhonePipe} from './phone.pipe';
 import {RepeatPipe} from './repeat.pipe';
+import {RightPadPipe} from './right-pad.pipe';
 import {RightTrimPipe} from './rtrim.pipe';
 import {SlugifyPipe} from './slugify.pipe';
 import {SplitPipe} from './split.pipe';
@@ -31,6 +32,7 @@ export * from './left-pad.pipe';
 export * from './ltrim.pipe';
 export * from './match.pipe';
 export * from './phone.pipe';
+export * from './right-pad.pipe';
 export * from './repeat.pipe';
 export * from './rtrim.pipe';
 export * from './slugify.pipe';
@@ -50,23 +52,31 @@ export * from './wrap.pipe';
 
 @NgModule({
   declarations: [
-    CamelizePipe,   EndsWithPipe,   LatinizePipe,
-    LeftPadPipe,    LeftTrimPipe,   MatchPipe,
-    PhonePipe,      RepeatPipe,     RightTrimPipe,
-    SlugifyPipe,    SplitPipe,      StartsWithPipe,
-    StringularPipe, StripTagsPipe,  TestPipe,
-    TitleizePipe,   TrimPipe,       TruncatePipe,
-    UcfirstPipe,    UnderscorePipe, UriComponentEncodePipe,
+    CamelizePipe,   EndsWithPipe,
+    LatinizePipe,   LeftPadPipe,
+    LeftTrimPipe,   MatchPipe,
+    PhonePipe,      RepeatPipe,
+    RightPadPipe,   RightTrimPipe,
+    SlugifyPipe,    SplitPipe,
+    StartsWithPipe, StringularPipe,
+    StripTagsPipe,  TestPipe,
+    TitleizePipe,   TrimPipe,
+    TruncatePipe,   UcfirstPipe,
+    UnderscorePipe, UriComponentEncodePipe,
     UriEncodePipe,  WrapPipe
   ],
   exports: [
-    CamelizePipe,   EndsWithPipe,   LatinizePipe,
-    LeftPadPipe,    LeftTrimPipe,   MatchPipe,
-    PhonePipe,      RepeatPipe,     RightTrimPipe,
-    SlugifyPipe,    SplitPipe,      StartsWithPipe,
-    StringularPipe, StripTagsPipe,  TestPipe,
-    TitleizePipe,   TrimPipe,       TruncatePipe,
-    UcfirstPipe,    UnderscorePipe, UriComponentEncodePipe,
+    CamelizePipe,   EndsWithPipe,
+    LatinizePipe,   LeftPadPipe,
+    LeftTrimPipe,   MatchPipe,
+    PhonePipe,      RepeatPipe,
+    RightPadPipe,   RightTrimPipe,
+    SlugifyPipe,    SplitPipe,
+    StartsWithPipe, StringularPipe,
+    StripTagsPipe,  TestPipe,
+    TitleizePipe,   TrimPipe,
+    TruncatePipe,   UcfirstPipe,
+    UnderscorePipe, UriComponentEncodePipe,
     UriEncodePipe,  WrapPipe
   ]
 })

diff --git a/src/string/right-pad.pipe.ts b/src/string/right-pad.pipe.ts
@@ -0,0 +1,14 @@
+import {Pipe, PipeTransform} from '@angular/core';
+
+import {isString} from '../utils/utils';
+
+@Pipe({name: 'rightPad'})
+export class RightPadPipe implements PipeTransform {
+  transform(input: string, requiredLength: number, padChar: string = ' '): string {
+    if (!isString(input) || input.length >= requiredLength) return input;
+
+    const diff: number = requiredLength - input.length;
+
+    return input + padChar.repeat(diff).slice(0, diff);
+  }
+}
diff --git a/test/string/right-pad.pipe.spec.ts b/test/string/right-pad.pipe.spec.ts
@@ -0,0 +1,57 @@
+import {RightPadPipe} from '../../src/index';
+
+describe('RightPadPipe', () => {
+  let pipe: RightPadPipe;
+
+  beforeEach(() => {
+    pipe = new RightPadPipe();
+  });
+
+  const data: Array<any> = [
+    {'input': 'a', 'requiredLength': 6, 'toEqual': 'a     ', 'valid': true},
+    {'input': 'abc', 'padChar': '123456', 'requiredLength': 6, 'toEqual': 'abc123', 'valid': true},
+    {
+      'input': 'abcdef',
+      'padChar': '123456',
+      'requiredLength': 2,
+      'toEqual': 'abcdef',
+      'valid': true
+    },
+    {'input': 'abcdef', 'padChar': '0', 'requiredLength': 6, 'toEqual': 'abcdef', 'valid': true}, {
+      'input': 'abc',
+      'padChar': 'foo',
+      'requiredLength': 10,
+      'toEqual': 'abcfoofoof',
+      'valid': true
+    },
+    {'input': 'abc', 'padChar': '0', 'requiredLength': 10, 'toEqual': 'abc0000000', 'valid': true},
+    {'input': null, 'padChar': '0', 'requiredLength': 10, 'toEqual': 'null000000', 'valid': false},
+    {
+      'input': undefined,
+      'padChar': '0',
+      'requiredLength': 10,
+      'toEqual': 'undefined0',
+      'valid': false
+    }
+  ];
+
+  for (const element of data) {
+    const testCase =
+        `Input '${element.input}' with padChar ('${element.padChar
+        }') and requiredLength (${element.requiredLength}) should be ${element.valid ?
+        'equal' :
+        'not equal'
+        } to ${element.toEqual}`;
+
+    it(testCase, () => {
+      if (element.valid) {
+        expect(pipe.transform(element.input, element.requiredLength, element.padChar))
+            .toEqual(element.toEqual);
+      } else {
+        expect(pipe.transform(element.input, element.requiredLength, element.padChar))
+            .not.toEqual(element.toEqual);
+      }
+    })
+  }
+
+});