github.com/pdfcpu/pdfcpu@v0.11.1/pkg/api/test/split_test.go (about)

     1  /*
     2  Copyright 2020 The pdf Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package test
    18  
    19  import (
    20  	"path/filepath"
    21  	"testing"
    22  
    23  	"github.com/pdfcpu/pdfcpu/pkg/api"
    24  	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
    25  )
    26  
    27  func TestSplitSpan1(t *testing.T) {
    28  	msg := "TestSplitSpan1"
    29  	fileName := "Acroforms2.pdf"
    30  	inFile := filepath.Join(inDir, fileName)
    31  
    32  	// Create single page files of inFile in outDir.
    33  	span := 1
    34  	if err := api.SplitFile(inFile, outDir, span, nil); err != nil {
    35  		t.Fatalf("%s: %v\n", msg, err)
    36  	}
    37  }
    38  
    39  func TestSplitSpan2(t *testing.T) {
    40  	msg := "TestSplitSpan2"
    41  	fileName := "Acroforms2.pdf"
    42  	inFile := filepath.Join(inDir, fileName)
    43  
    44  	// Create dual page files of inFile in outDir.
    45  	span := 2
    46  	if err := api.SplitFile(inFile, outDir, span, nil); err != nil {
    47  		t.Fatalf("%s: %v\n", msg, err)
    48  	}
    49  }
    50  
    51  func TestSplitByBookmark(t *testing.T) {
    52  	msg := "TestSplitByBookmark"
    53  	fileName := "5116.DCT_Filter.pdf"
    54  	inFile := filepath.Join(inDir, fileName)
    55  
    56  	// Split along bookmarks.
    57  	span := 0
    58  	if err := api.SplitFile(inFile, outDir, span, nil); err != nil {
    59  		t.Fatalf("%s: %v\n", msg, err)
    60  	}
    61  }
    62  
    63  func TestSplitByPageNr(t *testing.T) {
    64  	msg := "TestSplitByPageNr"
    65  	fileName := "5116.DCT_Filter.pdf"
    66  	inFile := filepath.Join(inDir, fileName)
    67  
    68  	// Generate page section 1
    69  	// Generate page section 2-9
    70  	// Generate page section 10-49
    71  	// Generate page section 50-last page
    72  
    73  	if err := api.SplitByPageNrFile(inFile, outDir, []int{2, 10, 50}, nil); err != nil {
    74  		t.Fatalf("%s: %v\n", msg, err)
    75  	}
    76  }
    77  
    78  func TestSplitLowLevel(t *testing.T) {
    79  	msg := "TestSplitLowLevel"
    80  	inFile := filepath.Join(inDir, "TheGoProgrammingLanguageCh1.pdf")
    81  	outFile := filepath.Join(outDir, "MyExtractedPageSpan.pdf")
    82  
    83  	// Create a context.
    84  	ctx, err := api.ReadContextFile(inFile)
    85  	if err != nil {
    86  		t.Fatalf("%s readContext: %v\n", msg, err)
    87  	}
    88  
    89  	// Extract a page span.
    90  	from, thru := 2, 4
    91  	selectedPages := api.PagesForPageRange(from, thru)
    92  	usePgCache := false
    93  	ctxNew, err := pdfcpu.ExtractPages(ctx, selectedPages, usePgCache)
    94  	if err != nil {
    95  		t.Fatalf("%s ExtractPages(%d,%d): %v\n", msg, from, thru, err)
    96  	}
    97  
    98  	// Here you can process this single page PDF context.
    99  
   100  	// Write context to file.
   101  	if err := api.WriteContextFile(ctxNew, outFile); err != nil {
   102  		t.Fatalf("%s write: %v\n", msg, err)
   103  	}
   104  }