mirror of
https://github.com/pulsar-edit/pulsar.git
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106 lines
4.5 KiB
CoffeeScript
106 lines
4.5 KiB
CoffeeScript
temp = require 'temp'
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path = require 'path'
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fs = require 'fs-plus'
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FileSystemBlobStore = require '../src/file-system-blob-store'
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describe "FileSystemBlobStore", ->
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[storageDirectory, blobStore] = []
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beforeEach ->
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storageDirectory = temp.path()
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blobStore = FileSystemBlobStore.load(storageDirectory)
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it "is empty when the file doesn't exist", ->
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expect(blobStore.get("foo", "invalidation-key-1")).toBeUndefined()
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expect(blobStore.get("bar", "invalidation-key-2")).toBeUndefined()
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it "allows to read and write buffers from/to memory without persisting them", ->
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blobStore.set("foo", "invalidation-key-1", new Buffer("foo"))
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blobStore.set("bar", "invalidation-key-2", new Buffer("bar"))
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expect(blobStore.get("foo", "invalidation-key-1")).toEqual(new Buffer("foo"))
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expect(blobStore.get("bar", "invalidation-key-2")).toEqual(new Buffer("bar"))
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expect(blobStore.get("foo", "unexisting-key")).toBeUndefined()
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expect(blobStore.get("bar", "unexisting-key")).toBeUndefined()
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it "persists buffers when saved and retrieves them on load, giving priority to in-memory ones", ->
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blobStore.set("foo", "invalidation-key-1", new Buffer("foo"))
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blobStore.set("bar", "invalidation-key-2", new Buffer("bar"))
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blobStore.save()
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blobStore = FileSystemBlobStore.load(storageDirectory)
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expect(blobStore.get("foo", "invalidation-key-1")).toEqual(new Buffer("foo"))
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expect(blobStore.get("bar", "invalidation-key-2")).toEqual(new Buffer("bar"))
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expect(blobStore.get("foo", "unexisting-key")).toBeUndefined()
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expect(blobStore.get("bar", "unexisting-key")).toBeUndefined()
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blobStore.set("foo", "new-key", new Buffer("changed"))
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expect(blobStore.get("foo", "new-key")).toEqual(new Buffer("changed"))
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expect(blobStore.get("foo", "invalidation-key-1")).toBeUndefined()
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it "persists both in-memory and previously stored buffers when saved", ->
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blobStore.set("foo", "invalidation-key-1", new Buffer("foo"))
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blobStore.set("bar", "invalidation-key-2", new Buffer("bar"))
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blobStore.save()
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blobStore = FileSystemBlobStore.load(storageDirectory)
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blobStore.set("bar", "invalidation-key-3", new Buffer("changed"))
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blobStore.set("qux", "invalidation-key-4", new Buffer("qux"))
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blobStore.save()
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blobStore = FileSystemBlobStore.load(storageDirectory)
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expect(blobStore.get("foo", "invalidation-key-1")).toEqual(new Buffer("foo"))
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expect(blobStore.get("bar", "invalidation-key-3")).toEqual(new Buffer("changed"))
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expect(blobStore.get("qux", "invalidation-key-4")).toEqual(new Buffer("qux"))
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expect(blobStore.get("foo", "unexisting-key")).toBeUndefined()
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expect(blobStore.get("bar", "invalidation-key-2")).toBeUndefined()
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expect(blobStore.get("qux", "unexisting-key")).toBeUndefined()
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it "allows to delete keys from both memory and stored buffers", ->
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blobStore.set("a", "invalidation-key-1", new Buffer("a"))
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blobStore.set("b", "invalidation-key-2", new Buffer("b"))
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blobStore.save()
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blobStore = FileSystemBlobStore.load(storageDirectory)
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blobStore.set("b", "invalidation-key-3", new Buffer("b"))
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blobStore.set("c", "invalidation-key-4", new Buffer("c"))
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blobStore.delete("b")
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blobStore.delete("c")
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blobStore.save()
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blobStore = FileSystemBlobStore.load(storageDirectory)
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expect(blobStore.get("a", "invalidation-key-1")).toEqual(new Buffer("a"))
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expect(blobStore.get("b", "invalidation-key-2")).toBeUndefined()
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expect(blobStore.get("b", "invalidation-key-3")).toBeUndefined()
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expect(blobStore.get("c", "invalidation-key-4")).toBeUndefined()
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it "ignores errors when loading an invalid blob store", ->
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blobStore.set("a", "invalidation-key-1", new Buffer("a"))
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blobStore.set("b", "invalidation-key-2", new Buffer("b"))
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blobStore.save()
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# Simulate corruption
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fs.writeFileSync(path.join(storageDirectory, "MAP"), new Buffer([0]))
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fs.writeFileSync(path.join(storageDirectory, "INVKEYS"), new Buffer([0]))
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fs.writeFileSync(path.join(storageDirectory, "BLOB"), new Buffer([0]))
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blobStore = FileSystemBlobStore.load(storageDirectory)
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expect(blobStore.get("a", "invalidation-key-1")).toBeUndefined()
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expect(blobStore.get("b", "invalidation-key-2")).toBeUndefined()
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blobStore.set("a", "invalidation-key-1", new Buffer("x"))
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blobStore.set("b", "invalidation-key-2", new Buffer("y"))
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blobStore.save()
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blobStore = FileSystemBlobStore.load(storageDirectory)
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expect(blobStore.get("a", "invalidation-key-1")).toEqual(new Buffer("x"))
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expect(blobStore.get("b", "invalidation-key-2")).toEqual(new Buffer("y"))
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