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Add test for svg.symbol.
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‎test/svg/symbol-test.js‎

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require("../env");
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require("../../d3");
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var vows = require("vows"),
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assert = require("assert");
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var suite = vows.describe("d3.svg.symbol");
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suite.addBatch({
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"symbol": {
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topic: function() {
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return d3.svg.symbol;
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},
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"default symbol is a fixed-size circle": function(symbol) {
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var a = symbol();
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assert.pathEqual(a(), "M0,4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,-4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,4.51351666838205Z");
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},
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"size accessor specifies shape area in square pixels": function(symbol) {
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var a = symbol().size(Number);
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assert.pathEqual(a(0), "M0,0A0,0 0 1,1 0,0A0,0 0 1,1 0,0Z");
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assert.pathEqual(a(Math.PI), "M0,1A1,1 0 1,1 0,-1A1,1 0 1,1 0,1Z");
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assert.pathEqual(a(4 * Math.PI), "M0,2A2,2 0 1,1 0,-2A2,2 0 1,1 0,2Z");
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},
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"size accessor is passed data and index": function(symbol) {
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var a = symbol().size(function(d, i) { return d.z * 2 + i; });
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assert.pathEqual(a({z: 0}, 0), "M0,0A0,0 0 1,1 0,0A0,0 0 1,1 0,0Z");
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assert.pathEqual(a({z: Math.PI}, 1), "M0,1.5225997130512636A1.5225997130512636,1.5225997130512636 0 1,1 0,-1.5225997130512636A1.5225997130512636,1.5225997130512636 0 1,1 0,1.5225997130512636Z");
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assert.pathEqual(a({z: 4 * Math.PI}, 2), "M0,2.938812646693828A2.938812646693828,2.938812646693828 0 1,1 0,-2.938812646693828A2.938812646693828,2.938812646693828 0 1,1 0,2.938812646693828Z");
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},
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"supports cross symbol type": function(symbol) {
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var a = symbol().type("cross").size(Number);
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assert.pathEqual(a(0), "M0,0H0V0H0V0H0V0H0V0H0V0H0Z");
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assert.pathEqual(a(20), "M-3,-1H-1V-3H1V-1H3V1H1V3H-1V1H-3Z");
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},
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"supports diamond symbol type": function(symbol) {
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var a = symbol().type("diamond").size(Number);
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assert.pathEqual(a(0), "M0,0L0,0 0,0 0,0Z");
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assert.pathEqual(a(10), "M0,-2.9428309563827124L1.6990442448471224,0 0,2.9428309563827124 -1.6990442448471224,0Z");
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},
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"supports square symbol type": function(symbol) {
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var a = symbol().type("square").size(Number);
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assert.pathEqual(a(0), "M0,0L0,0 0,0 0,0Z");
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assert.pathEqual(a(4), "M-1,-1L1,-1 1,1 -1,1Z");
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assert.pathEqual(a(16), "M-2,-2L2,-2 2,2 -2,2Z");
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},
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"supports triangle-down symbol type": function(symbol) {
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var a = symbol().type("triangle-down").size(Number);
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assert.pathEqual(a(0), "M0,0L0,0 0,0Z");
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assert.pathEqual(a(10), "M0,2.0808957251439084L2.4028114141347543,-2.0808957251439084 -2.4028114141347543,-2.0808957251439084Z");
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},
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"supports triangle-up symbol type": function(symbol) {
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var a = symbol().type("triangle-up").size(Number);
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assert.pathEqual(a(0), "M0,0L0,0 0,0Z");
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assert.pathEqual(a(10), "M0,-2.0808957251439084L2.4028114141347543,2.0808957251439084 -2.4028114141347543,2.0808957251439084Z");
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},
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"unknown symbol type defaults to circle": function(symbol) {
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var a = symbol().type(String);
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assert.pathEqual(a(), "M0,4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,-4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,4.51351666838205Z");
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assert.pathEqual(a("invalid"), "M0,4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,-4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,4.51351666838205Z");
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},
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"can specify type accessor as a function": function(symbol) {
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var a = symbol().type(String);
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assert.pathEqual(a("circle"), "M0,4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,-4.51351666838205A4.51351666838205,4.51351666838205 0 1,1 0,4.51351666838205Z");
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assert.pathEqual(a("cross"), "M-5.366563145999495,-1.7888543819998317H-1.7888543819998317V-5.366563145999495H1.7888543819998317V-1.7888543819998317H5.366563145999495V1.7888543819998317H1.7888543819998317V5.366563145999495H-1.7888543819998317V1.7888543819998317H-5.366563145999495Z");
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assert.pathEqual(a("diamond"), "M0,-7.444838872816797L4.298279727294167,0 0,7.444838872816797 -4.298279727294167,0Z");
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assert.pathEqual(a("square"), "M-4,-4L4,-4 4,4 -4,4Z");
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assert.pathEqual(a("triangle-down"), "M0,5.26429605180997L6.078685485212741,-5.26429605180997 -6.078685485212741,-5.26429605180997Z");
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assert.pathEqual(a("triangle-up"), "M0,-5.26429605180997L6.078685485212741,5.26429605180997 -6.078685485212741,5.26429605180997Z");
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}
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},
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"symbolTypes": {
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topic: function() {
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return d3.svg.symbolTypes;
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},
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"contains circle": function(types) {
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assert.isTrue(types.indexOf("circle") != -1);
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},
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"contains cross": function(types) {
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assert.isTrue(types.indexOf("cross") != -1);
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},
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"contains diamond": function(types) {
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assert.isTrue(types.indexOf("diamond") != -1);
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},
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"contains square": function(types) {
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assert.isTrue(types.indexOf("square") != -1);
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},
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"contains triangle-down": function(types) {
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assert.isTrue(types.indexOf("triangle-down") != -1);
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},
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"contains triangle-up": function(types) {
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assert.isTrue(types.indexOf("triangle-up") != -1);
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}
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}
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});
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suite.export(module);

‎test/svg/test-symbol.js‎

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‎test/svg/test-symbol.out‎

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