tests + updates

src/services/tiny_post_html_processor/tiny_post_html_processor.service.js

@@ -2,6 +2,8 @@
  * This is a tiny purpose-built HTML parser/processor. This basically detects any type of visual newline and
  * allows it to be processed, useful for greentexting, mostly
  *
+ * known issue: doesn't handle CDATA so nested CDATA might not work well
+ *
  * @param {Object} input - input data
  * @param {(string) => string} processor - function that will be called on every line
  * @return {string} processed html
@@ -22,11 +24,15 @@ export const processHtml = (html, processor) => {
   }
 
   const flush = () => { // Processes current line buffer, adds it to output buffer and clears line buffer
-    buffer += processor(textBuffer)
+    if (textBuffer.trim().length > 0) {
+      buffer += processor(textBuffer)
+    } else {
+      buffer += textBuffer
+    }
     textBuffer = ''
   }
 
-  const handleBr = (tag) => { // handles single newlines/linebreaks
+  const handleBr = (tag) => { // handles single newlines/linebreaks/selfclosing
     flush()
     buffer += tag
   }
@@ -59,10 +65,12 @@ export const processHtml = (html, processor) => {
       if (handledTags.has(tagName)) {
         if (tagName === 'br') {
           handleBr(tagFull)
-        }
-        if (openCloseTags.has(tagFull)) {
+        } else if (openCloseTags.has(tagName)) {
           if (tagFull[1] === '/') {
             handleClose(tagFull)
+          } else if (tagFull[tagFull.length - 2] === '/') {
+            // self-closing
+            handleBr(tagFull)
           } else {
             handleOpen(tagFull)
           }
@@ -76,6 +84,9 @@ export const processHtml = (html, processor) => {
       textBuffer += char
     }
   }
+  if (tagBuffer) {
+    textBuffer += tagBuffer
+  }
 
   flush()
 

test/unit/specs/services/tiny_post_html_processor/tiny_post_html_processor.spec.js

@@ -0,0 +1,96 @@
+import { processHtml } from 'src/services/tiny_post_html_processor/tiny_post_html_processor.service.js'
+
+describe('TinyPostHTMLProcessor', () => {
+  describe('with processor that keeps original line should not make any changes to HTML when', () => {
+    const processorKeep = (line) => line
+    it('fed with regular HTML with newlines', () => {
+      const inputOutput = '1<br/>2<p class="lol">3 4</p> 5 \n 6 <p > 7 <br> 8 </p> <br>\n<br/>'
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+
+    it('fed with possibly broken HTML with invalid tags/composition', () => {
+      const inputOutput = '<feeee dwdwddddddw> <i>ayy<b>lm</i>ao</b> </section>'
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+
+    it('fed with very broken HTML with broken composition', () => {
+      const inputOutput = '</p> lmao what </div> whats going on <div> wha <p>'
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+
+    it('fed with sorta valid HTML but tags aren\'t closed', () => {
+      const inputOutput = 'just leaving a <div> hanging'
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+
+    it('fed with not really HTML at this point... tags that aren\'t finished', () => {
+      const inputOutput = 'do you expect me to finish this <div class='
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+
+    it('fed with dubiously valid HTML (p within p and also div inside p)', () => {
+      const inputOutput = 'look ma <p> p \nwithin <p> p! </p> and a <br/><div>div!</div></p>'
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+
+    it('fed with maybe valid HTML? self-closing divs and ps', () => {
+      const inputOutput = 'a <div class="what"/> what now <p aria-label="wtf"/> ?'
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+
+    it('fed with valid XHTML containing a CDATA', () => {
+      const inputOutput = 'Yes, it is me, <![CDATA[DIO]]>'
+      expect(processHtml(inputOutput, processorKeep)).to.eql(inputOutput)
+    })
+  })
+  describe('with processor that replaces lines with word "_" should match expected line when', () => {
+    const processorReplace = (line) => '_'
+    it('fed with regular HTML with newlines', () => {
+      const input = '1<br/>2<p class="lol">3 4</p> 5 \n 6 <p > 7 <br> 8 </p> <br>\n<br/>'
+      const output = '_<br/>_<p class="lol">_</p>_\n_<p >_<br>_</p> <br>\n<br/>'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+
+    it('fed with possibly broken HTML with invalid tags/composition', () => {
+      const input = '<feeee dwdwddddddw> <i>ayy<b>lm</i>ao</b> </section>'
+      const output = '_'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+
+    it('fed with very broken HTML with broken composition', () => {
+      const input = '</p> lmao what </div> whats going on <div> wha <p>'
+      const output = '</p>_</div>_<div>_<p>'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+
+    it('fed with sorta valid HTML but tags aren\'t closed', () => {
+      const input = 'just leaving a <div> hanging'
+      const output = '_<div>_'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+
+    it('fed with not really HTML at this point... tags that aren\'t finished', () => {
+      const input = 'do you expect me to finish this <div class='
+      const output = '_'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+
+    it('fed with dubiously valid HTML (p within p and also div inside p)', () => {
+      const input = 'look ma <p> p \nwithin <p> p! </p> and a <br/><div>div!</div></p>'
+      const output = '_<p>_\n_<p>_</p>_<br/><div>_</div></p>'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+
+    it('fed with maybe valid HTML? self-closing divs and ps', () => {
+      const input = 'a <div class="what"/> what now <p aria-label="wtf"/> ?'
+      const output = '_<div class="what"/>_<p aria-label="wtf"/>_'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+
+    it('fed with valid XHTML containing a CDATA', () => {
+      const input = 'Yes, it is me, <![CDATA[DIO]]>'
+      const output = '_'
+      expect(processHtml(input, processorReplace)).to.eql(output)
+    })
+  })
+})