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annotate web/patch.test.ts @ 2408:7e7874fed2e3

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buttons to add panels to the layout
author drewp@bigasterisk.com
date Sat, 18 May 2024 21:02:32 -0700
parents 4556eebe5d73
children
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1 import { assert, describe, expect, it } from "vitest";
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2
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3 import { Quad, NamedNode } from "n3";
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4 import { Patch, QuadPattern } from "./patch";
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5 import * as N3 from "n3";
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6
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7 const node1 = new NamedNode("http://example.com/node1");
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8 const node2 = new NamedNode("http://example.com/node2");
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9 const node3 = new NamedNode("http://example.com/node3");
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10
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11 const decimalDT = new NamedNode("http://www.w3.org/2001/XMLSchema#decimal");
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12
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13 function QP(
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14 subject: N3.Quad_Subject | null, //
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15 predicate: N3.Quad_Predicate | null,
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16 object: N3.Quad_Object | null,
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17 graph: N3.Quad_Graph | null
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18 ): QuadPattern {
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19 return { subject, predicate, object, graph };
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20 }
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21
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22 describe("Patch.matches", () => {
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23 it("matches any quads against an open pattern", () => {
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24 const quad1 = new Quad(node1, node2, node3);
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25 const quad2 = new Quad(node1, node2, node3);
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26 const quad3 = new Quad(node1, node2, node3);
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27
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28 const pattern = QP(null, null, null, null);
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29
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30 const p = new Patch([quad1, quad2], [quad3]);
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31
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32 assert.isTrue(p.matches(pattern));
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33 });
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34 it("doesn't match when the patch is empty", () => {
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35 const p = new Patch([], []);
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36 assert.isFalse(p.matches(QP(null, null, null, null)));
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37 });
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38 it("compares terms correctly", () => {
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39 assert.isTrue(new Patch([new Quad(node1, node2, node3)], []).matches(QP(node1, null, null, null)));
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40 assert.isFalse(new Patch([new Quad(node1, node2, node3)], []).matches(QP(node2, null, null, null)));
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41 });
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42 it("matches on just one set term", () => {
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43 assert.isTrue(new Patch([new Quad(node1, node2, node3)], []).matches(QP(node1, null, null, null)));
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44 assert.isTrue(new Patch([new Quad(node1, node2, node3)], []).matches(QP(null, node2, null, null)));
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45 assert.isTrue(new Patch([new Quad(node1, node2, node3)], []).matches(QP(null, null, node3, null)));
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46 });
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47 });
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48
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49 describe("Patch.empty", () => {
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50 it("works with no quads", () => {
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51 const p = new Patch([], []);
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52 assert.isTrue(p.isEmpty());
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53 });
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54 it("works with unmatched quads", () => {
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55 const p = new Patch([], [new Quad(node1, node2, node3)]);
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56 assert.isFalse(p.isEmpty());
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57 });
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58 it("understands floats are equal", () => {
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59 const p = new Patch(
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60 [new Quad(node1, node2, N3.DataFactory.literal((0.12345).toPrecision(3), decimalDT))],
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61 [new Quad(node1, node2, N3.DataFactory.literal((0.1234).toPrecision(3), decimalDT))]
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62 );
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63 assert.isTrue(p.isEmpty());
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64 });
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65 it("...and when they're not", () => {
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66 const p = new Patch(
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67 [new Quad(node1, node2, N3.DataFactory.literal(0.123, decimalDT))], //
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68 [new Quad(node1, node2, N3.DataFactory.literal(0.124, decimalDT))]
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69 );
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70 assert.isFalse(p.isEmpty());
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71 });
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72 it("understands literals are equal", () => {
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73 const p = new Patch(
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74 [new Quad(node1, node2, node3)], //
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75 [new Quad(node1, node2, new NamedNode("http://example.com/node" + "3"))]
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76 );
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77 assert.isTrue(p.isEmpty());
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78 });
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79 });