init

node_modules/stream-splicer/test/splice.js

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+var pipeline = require('../');
+var through = require('through2');
+var split = require('split');
+var concat = require('concat-stream');
+var test = require('tape');
+
+test('splice', function (t) {
+    var expected = {};
+    expected.replacer = [ '333', '444', '5000', '6000' ];
+    expected.d = [ 3, 4 ];
+    expected.thousander = [ 5, 6 ];
+    
+    t.plan(4 + 2 + 2 + 1);
+    
+    var a = split();
+    var b = through.obj(function (row, enc, next) {
+        this.push(JSON.parse(row));
+        next();
+    });
+    var c = through.obj(function (row, enc, next) {
+        this.push(row.x);
+        next();
+    });
+    var d = through.obj(function (x, enc, next) {
+        t.equal(x, expected.d.shift(), 'd');
+        this.push(String(x * 111));
+        next();
+    });
+    var thousander = through.obj(function (x, enc, next) {
+        t.equal(x, expected.thousander.shift(), 'thousander');
+        this.push(String(x * 1000));
+        next();
+    });
+    
+    var replacer = through(function (buf, enc, next) {
+        var ex = expected.replacer.shift();
+        t.equal(buf.toString(), ex);
+        if (expected.replacer.length === 2) {
+            stream.splice(3, 1, thousander);
+        }
+        this.push(buf.toString('hex') + '\n');
+        next();
+    });
+    
+    var stream = pipeline([ a, b, c, d, replacer ]);
+    stream.pipe(concat(function (body) {
+        t.deepEqual(
+            body.toString(),
+            '333333\n343434\n35303030\n36303030\n'
+        );
+    }));
+    
+    stream.write('{"x":3}\n');
+    stream.write('{"x":4}\n');
+    stream.write('{"x":5}\n');
+    stream.write('{"x":6}');
+    stream.end();
+});