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page.go
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page.go
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package shared_tests
import (
"io/ioutil"
"github.com/michalderdak/go-pdfium/errors"
"github.com/michalderdak/go-pdfium/references"
"github.com/michalderdak/go-pdfium/requests"
"github.com/michalderdak/go-pdfium/responses"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("page", func() {
BeforeEach(func() {
Locker.Lock()
})
AfterEach(func() {
Locker.Unlock()
})
Context("a normal PDF file", func() {
var doc references.FPDF_DOCUMENT
BeforeEach(func() {
pdfData, err := ioutil.ReadFile(TestDataPath + "/testdata/test.pdf")
Expect(err).To(BeNil())
newDoc, err := PdfiumInstance.FPDF_LoadMemDocument(&requests.FPDF_LoadMemDocument{
Data: &pdfData,
})
Expect(err).To(BeNil())
doc = newDoc.Document
})
AfterEach(func() {
FPDF_CloseDocument, err := PdfiumInstance.FPDF_CloseDocument(&requests.FPDF_CloseDocument{
Document: doc,
})
Expect(err).To(BeNil())
Expect(FPDF_CloseDocument).To(Not(BeNil()))
})
When("is opened", func() {
Context("when an invalid page is given", func() {
Context("GetPageRotation()", func() {
It("returns an error", func() {
pageRotation, err := PdfiumInstance.FPDFPage_GetRotation(&requests.FPDFPage_GetRotation{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 1,
},
},
})
Expect(err).To(MatchError(errors.ErrPage.Error()))
Expect(pageRotation).To(BeNil())
})
})
Context("GetPageTransparency()", func() {
It("returns an error", func() {
pageTransparency, err := PdfiumInstance.FPDFPage_HasTransparency(&requests.FPDFPage_HasTransparency{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 1,
},
},
})
Expect(err).To(MatchError(errors.ErrPage.Error()))
Expect(pageTransparency).To(BeNil())
})
})
Context("FlattenPage()", func() {
It("returns an error", func() {
flattenedPage, err := PdfiumInstance.FPDFPage_Flatten(&requests.FPDFPage_Flatten{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 1,
},
},
Usage: requests.FPDFPage_FlattenUsageNormalDisplay,
})
Expect(err).To(MatchError(errors.ErrPage.Error()))
Expect(flattenedPage).To(BeNil())
})
})
})
Context("when the page rotation is requested", func() {
It("returns the correct rotation", func() {
rotation, err := PdfiumInstance.FPDFPage_GetRotation(&requests.FPDFPage_GetRotation{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
})
Expect(err).To(BeNil())
Expect(rotation).To(Equal(&responses.FPDFPage_GetRotation{}))
})
})
Context("when the page transparency is requested", func() {
It("returns the correct transparency", func() {
pageTransparency, err := PdfiumInstance.FPDFPage_HasTransparency(&requests.FPDFPage_HasTransparency{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
})
Expect(err).To(BeNil())
Expect(pageTransparency).To(Equal(&responses.FPDFPage_HasTransparency{
HasTransparency: false,
}))
})
})
Context("when the page flattening is requested", func() {
It("returns that the page does not need to be flattened", func() {
pageFlattenResult, err := PdfiumInstance.FPDFPage_Flatten(&requests.FPDFPage_Flatten{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
Usage: requests.FPDFPage_FlattenUsageNormalDisplay,
})
Expect(err).To(BeNil())
Expect(pageFlattenResult).To(Equal(&responses.FPDFPage_Flatten{
Result: responses.FPDFPage_FlattenResultNothingToDo,
}))
})
})
})
})
Context("a PDF file that uses an alpha channel", func() {
var doc references.FPDF_DOCUMENT
BeforeEach(func() {
pdfData, err := ioutil.ReadFile(TestDataPath + "/testdata/alpha_channel.pdf")
Expect(err).To(BeNil())
newDoc, err := PdfiumInstance.FPDF_LoadMemDocument(&requests.FPDF_LoadMemDocument{
Data: &pdfData,
})
Expect(err).To(BeNil())
doc = newDoc.Document
})
AfterEach(func() {
FPDF_CloseDocument, err := PdfiumInstance.FPDF_CloseDocument(&requests.FPDF_CloseDocument{
Document: doc,
})
Expect(err).To(BeNil())
Expect(FPDF_CloseDocument).To(Not(BeNil()))
})
When("the page transparency is requested", func() {
It("returns the correct transparency", func() {
pageTransparency, err := PdfiumInstance.FPDFPage_HasTransparency(&requests.FPDFPage_HasTransparency{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
})
Expect(err).To(BeNil())
Expect(pageTransparency).To(Equal(&responses.FPDFPage_HasTransparency{
HasTransparency: true,
}))
})
})
When("the page transparency is requested by a wrong page reference", func() {
It("loadPage returns an error", func() {
fakeReference := references.FPDF_PAGE("")
pageTransparency, err := PdfiumInstance.FPDFPage_HasTransparency(&requests.FPDFPage_HasTransparency{
Page: requests.Page{
ByReference: &fakeReference,
},
})
Expect(err).To(Not(BeNil()))
Expect(pageTransparency).To(BeNil())
})
})
When("the page transparency is requested by page reference", func() {
It("returns the correct transparency", func() {
FPDF_LoadPage, err := PdfiumInstance.FPDF_LoadPage(&requests.FPDF_LoadPage{
Document: doc,
Index: 0,
})
Expect(err).To(BeNil())
Expect(FPDF_LoadPage).To(Not(BeNil()))
Expect(FPDF_LoadPage.Page).To(Not(BeNil()))
pageTransparency, err := PdfiumInstance.FPDFPage_HasTransparency(&requests.FPDFPage_HasTransparency{
Page: requests.Page{
ByReference: &FPDF_LoadPage.Page,
},
})
Expect(err).To(BeNil())
Expect(pageTransparency).To(Equal(&responses.FPDFPage_HasTransparency{
HasTransparency: true,
}))
})
})
})
})