feat: Initial clean release of CHM

packages/fork-sax/test/bom.js

@@ -0,0 +1,47 @@
+// BOM at the very begining of the stream should be ignored
+require(__dirname).test({
+  xml: '\uFEFF<P></P>',
+  expect: [
+    ['opentagstart', {'name': 'P', attributes: {}}],
+    ['opentag', {'name': 'P', attributes: {}, isSelfClosing: false}],
+    ['closetag', 'P']
+  ]
+})
+
+// In all other places it should be consumed
+require(__dirname).test({
+  xml: '\uFEFF<P BOM="\uFEFF">\uFEFFStarts and ends with BOM\uFEFF</P>',
+  expect: [
+    ['opentagstart', {'name': 'P', attributes: {}}],
+    ['attribute', {'name': 'BOM', 'value': '\uFEFF'}],
+    ['opentag', {'name': 'P', attributes: {'BOM': '\uFEFF'}, isSelfClosing: false}],
+    ['text', '\uFEFFStarts and ends with BOM\uFEFF'],
+    ['closetag', 'P']
+  ]
+})
+
+// BOM after a whitespace is an error
+require(__dirname).test({
+  xml: ' \uFEFF<P></P>',
+  expect: [
+    ['error', 'Non-whitespace before first tag.\nLine: 0\nColumn: 2\nChar: \uFEFF'],
+    ['text', '\uFEFF'],
+    ['opentagstart', {'name': 'P', attributes: {}}],
+    ['opentag', {'name': 'P', attributes: {}, isSelfClosing: false}],
+    ['closetag', 'P']
+  ],
+  strict: true
+})
+
+// There is only one BOM allowed at the start
+require(__dirname).test({
+  xml: '\uFEFF\uFEFF<P></P>',
+  expect: [
+    ['error', 'Non-whitespace before first tag.\nLine: 0\nColumn: 2\nChar: \uFEFF'],
+    ['text', '\uFEFF'],
+    ['opentagstart', {'name': 'P', attributes: {}}],
+    ['opentag', {'name': 'P', attributes: {}, isSelfClosing: false}],
+    ['closetag', 'P']
+  ],
+  strict: true
+})