Test

Inspector

constructor

inherits from EventEmitter

accepts an array of file paths

assigns a default threshold of 30

accepts an options object

run

emits a start event

emits an end event

emits the "match" event when a match is found

can find an exact match between instances

can find the largest match between two instances

supports ES6

supports JSX

supports Flow

includes the lines with the match

ignores matches with less than the supplied minimum

ignores CommonJS require statements

ignores AMD define expressions

Match

has a hash based on the node types

stores instance objects containing filename, start and end

uses the minimum start value of nodes in an instance

populateLines

adds the relevant source lines as a prop to each instance

NodeUtils

walkSubtrees

walks each child node using DFS

getDFSTraversal

returns the DFS traversal of the AST

getBFSTraversal

returns the BFS traversal of the AST

getChildren

returns the children of a Node

ignores null children

ignores empty JSXText nodes

isBefore

given nodes with different line numbers

returns true if the first node has a lower line number

returns false if the first node has a higher numbered line

given nodes with the same line number

returns true if the first node has a lower column number

returns false if the first node has a higher column number

isES6ModuleImport

returns true for an import declaration

returns false for export declaration

returns false otherwise

isAMD

returns true for an expression containing a define

returns true for an expression containing a define

returns true even if the function is a property

returns true even if a nested property

returns false otherwise

isCommonJS

returns true for an expression containing a require

returns true for a declaration containing a require

returns false otherwise

typesMatch

returns true if all node types match

returns false if not all node types match

identifiersMatch

returns true if all node are matching identifiers

returns false if not all node names match

literalsMatch

returns true if all literals have the same value

returns false if not all literals have the same value

treats JSXText as a literal

ignores the values of nodes which are not literals

parse

on error

includes the filename of the file that failed to parse

includes a caret pointing to the unexpected token

does not include the src line if longer than 100 chars

BaseReporter

constructor

accepts an inspector as an argument

registers a listener for the match event

given a match

increments the number found

invokes _getOutput

summary

can be printed on inspector end

prints the correct results if no matches were found

prints the correct results if matches were found

DefaultReporter

constructor

accepts an inspector as an argument

prints the summary on end

given a match

prints the instances

JSONReporter

constructor

accepts an inspector as an argument

prints valid json

given a match

prints the instances and their location

can write to a custom stream

PMDReporter

constructor

accepts an inspector as an argument

given a match

prints paths and line numbers in a duplication element